José María Ferreras Amez1, Belén Arribas Entrala2, Carmen Aspiroz3, Ana Ezpeleta Galindo4, Beatriz Boned Juliani5. 1. Servicio de Urgencias, Hospital Clínico Universitario Lozano Blesa, Universidad de Zaragoza. Grupo INFURG-SEMES, Zaragoza, España. 2. Servicio de Urgencias, Hospital Miguel Servet, Zaragoza, España. 3. Servicio de Microbiología, Hospital Royo Villanova, Zaragoza, España. 4. Servicio de Medicina Intensiva, Hospital Royo Villanova, Zaragoza, España. 5. Servicio de Bioquímica, Hospital Royo Villanova, Zaragoza, España.
Abstract
OBJECTIVES: To assess seasonal variation in episodes of bacteremia. MATERIAL AND METHODS: Retrospective cohort study of cases of significant bacteremia found in blood cultures ordered in a hospital emergency department. The incidence, etiology, diagnostic and prognostic yield were analyzed for each season of the year. RESULTS: A total of 4384 blood cultures were ordered in 4.1% of the emergency patients attended. The diagnostic yield was 12.2% (incidence, 490 cases per 100 000 cases attended). Cultures were ordered more often in winter (in 4.6% of the patients vs in 3.8% in the other seasons on average, P<.001). The diagnostic yield was lower in winter than in the other seasons (10.2% vs 13%, P=.01), and the contamination rate was higher (4.9% vs 3.8%, P=.02). Escherichia coli was isolated in fewer cultures in winter than in other seasons (36.4% vs 46.9%, P=.03), and Streptococcus pneumoniae was isolated in more (14.5% vs 5.9%, P=.001). CONCLUSION: The microbiological profile of blood cultures, their diagnostic yield, and rate of contamination differ greatly in winter.
OBJECTIVES: To assess seasonal variation in episodes of bacteremia. MATERIAL AND METHODS: Retrospective cohort study of cases of significant bacteremia found in blood cultures ordered in a hospital emergency department. The incidence, etiology, diagnostic and prognostic yield were analyzed for each season of the year. RESULTS: A total of 4384 blood cultures were ordered in 4.1% of the emergency patients attended. The diagnostic yield was 12.2% (incidence, 490 cases per 100 000 cases attended). Cultures were ordered more often in winter (in 4.6% of the patients vs in 3.8% in the other seasons on average, P<.001). The diagnostic yield was lower in winter than in the other seasons (10.2% vs 13%, P=.01), and the contamination rate was higher (4.9% vs 3.8%, P=.02). Escherichia coli was isolated in fewer cultures in winter than in other seasons (36.4% vs 46.9%, P=.03), and Streptococcus pneumoniae was isolated in more (14.5% vs 5.9%, P=.001). CONCLUSION: The microbiological profile of blood cultures, their diagnostic yield, and rate of contamination differ greatly in winter.
Authors: Ning Zeng; Jian Yang; Nan Xiang; Sai Wen; Silüe Zeng; Shuo Qi; Wen Zhu; Haoyu Hu; Chihua Fang Journal: Nan Fang Yi Ke Da Xue Xue Bao Date: 2020-08-30
Authors: S Z Iqbal-Mirza; R Estévez-González; V Serrano-Romero de Ávila; E de Rafael González; E Heredero-Gálvez; A Julián-Jiménez Journal: Rev Esp Quimioter Date: 2019-11-29 Impact factor: 1.553